Loading coil container



Nov 21, 1933. c. RHODES 1: AL

LOADIN'G COIL CONTAINER Filed Jan. 27, 1932 2 Sheets-Sheet l I'ru rsn urs Email Hh'cadei Jul-Ln Hag FH'LH'E E Nov. 21 1933. Q RHODEs ET AL 1,935,918

LOADING COIL CONTAINER I Filed Jan. 27, 1952 2 Sheets-Sheet 2 mi IF? E5211 Ehmdes John Hag Phillips Patented Nov. 21, 1933 PATENT OFFICE v LOADING COIL CONTAINER Cecil Rhodes, Southport, and John Hay Phillips,

Liverpool, England, assignors to Associated Telephone and Telegraph Company, Chicag 11]., a corporation of Delaware Application January 27, 1932, Serial No. 589,119, 7

and in Great Britain January30, 1931 11 Claims. (01. ids-4s) The present invention relates loading coils for telephone lines and more particularly concerns improvements in their method of mounting. Hitherto it has been usual to mount the coils in groups on wooden spindles in such manner that each coil is shielded from its neighbour by a metal washer of slightly larger diameter than the coil, while moreover metal screens are employed to effect shielding between adjacent groups of coils. Although such arrangements have already been widely used and have achieved a considerable amount of success in operation the mounting of the coils on a common spindle is not altogether desirable since with this arrangement the lower coils are required to withstand the weight of those above, and this may be considerable in the case of large groups, while moreover the replacement of a coil which-may have become defective during assembly is rengo dered extremely dimcult owing to the presence of the centre mounting spindle. The object of the present invention therefore,

is to overcome these disadvantages by an improved method of mounting and according to one feature of the invention therefore each loading coil is located ina separate tube, the ends of said tubes being closed flat plates which are clamped in position by a fixing means common to a number of said tubes. V

According to a further feature of the invention a mounting arrangement for a loading coil comprises a tube of internal dimensions substantially the same "as those of the loading coil, the

ends of said tube being closed by fiat plates.

The invention will be better understood from the following description of one method of c arrying it into effect reference being had to the accompanying drawings comprising Figs. 1, 2 and 3 which show in detail the screening arrangements for a particular coil, while Figs. 4

and 5 show a number of coils assembled in column to a common fixing means.

Referring now particularly to Fig. 1, this shows a plan view of the tube 10 preferably composed of metal of high electrical conductivity, provided with the insulating bushes 11 set diametrically opposite to each other through which connection to the coils may be made. Fig. 3 shows a typical flat plate 12 also composed of metal of .50 high electrical conductivity provided with the lugs 13 which are drilled to accommodate the common fixing means. In order to provide a locating means for the tubes 10 the tongues 14 are pressed up out of the plate 12 in circle substantially equal to the inside diameter of the tube. Fig. 2 shows in section the screening arrangements for a single coil from which it will be seen that the tube 10 is located over the projections 14 in the lower plate 12 while the upper plate 16 which closes the upper end of the tube is also provided with projections 17 for locating I the tube of the adjacent assembly. With this ar- Y rangement it will be seen that a single fiat plate is employed for closing the ends of adjacent tubes. When mounted in position the plates and c5 tubes are clampedtightly together so that good electrical connection will be established between the components.

Preferably also the container so formed will. havev its inner faces adjacent to the coil,'lined with an insulating material, and this is accomplished by providing the insulating discs 18 and 19 above and below the coil while theouter edges of the-coil are encircled by a fiexiblestrip of insulating material 20.

In this manner the coils are insulated and completely surrounded by metal of high conductivity and are by this means rendered almost immune from cross talk due to electromagnetic induction. v V v Referring now particularly toFig. 4 whichshows the coils assembled in their mounted positionyit will be assumed for the purpose of this description that theupper mounting platform 21 is the lid of a loading coil container of the i generally accepte d design. To this platform are screwedorwelded four" supporting rods 22 threaded at theinends and provided with the "nuts 23 by meansof which the assembly may be clamped in position. ,"lhe method of assembly is such that the plates and tubes which contain the coilsare alternately mounted and when the full capacity of the rods is reached the columns so formed are clamped in position by the nutspreviously mentioned. 7 Conveniently also the centre metal tube over the projections on the plate so that the tube and coil may be withdrawn sideways from the column- In practice of course, it will generally be found necessary when the coil and tube are removed for a suitable block of wood or like material to be inserted between the upper 1 10 and lower plates so as to prevent displacement of the whole assembly. A further advantage may be found in the fact that since the coil assemblies are in effect hinged to the supporting rods they may be collapsed towards each other in the manner indicated i'nFig. 5 so as to economize in the overall mounting space.

What we claim as new and desire to secure by Letters Patent is:

1. In a mounting arrangement for loading coils, a plurality of tubes, plates closing the ends of said tubes, a loading coil located in each of I said tubes, and fixing means common to saidformation, a loading coil in each of said tubes,

flat plates between each of said tubes, and locating projections on said flat plates engaging with said tubes so as to maintain them substantially concentric with one another.

4. In a mounting arrangement for loading coils, a plurality of tubes mounted in column 1 formation, a loading coil in'each of said tubes, fiat plates between said tubes and closing the ends thereof, and a plurality of projecting lugs formed out of said flat plates in a circle substantially equal tothe inside diameter of said tubes to maintain them concentric with one anbther in the column.

5. In a mounting arrangement for loading coils, a plurality of tubes arranged in column formation, a loading coil in each oi? said tubes, fiat plates between said tubes and closing each find thereof, lugs on said fl at plates, and common fixing" means extending through said lugs for clamping said plates and tubes together.

6. In a mounting arrangement for loading coils, a plurality of tubes arranged column formation, a loading coil-in each of said-tubes,

flat plates between each tube and closing its ends, lugs on said-flat plates, "an -common fixing rods extendingthrough said lugs for blamping said flat plates and tubes together, said fixing rods arranged in stage ed formation with respect to one another. v v I I. In a mounting arrangement for loading colls,'a plurality of rows of tubes, the tubes in each 'row arranged in column formatioma loading coil in each of said tubes, flat plates between each of said tubes and closing the ends thereof, lugs on said flat plates, supporting rods common to each row of tubes and extending through said lugs for clamping said tubes and plates together, said supporting rods arranged in staggered formation with respect to one another and the rows of tubes.

I 8. In a mounting arrangement for loading coils, a plurality of tubes arranged in column formation, a loading coil in each of said tubes, flat plates between said tubes and closing the ends thereof, projecting lugs formed in said plates and engaging said tubes to support them concentric with one another, means for clamping said plates and tubes together, said clamping means arranged to be loosened'slightly to permit withdrawal 'of any one of said tubes and its asso- 'ciated loading coil from between said flat plates without disturbing the other tubes and loading coils in the column. I

9. In amounting arrangement for loading coils, a plurality of tubes arranged in column formation, a loading coil in each of said tubes,

' flat'plat'es separating saidtubes and closing the ends thereof, projecting lugs concentricallyspaced on said plates and engaging the side of said'tubes to support them one above the other, supporting rods engaging said plates outside of said'tubes' to clamp said plates and tubes together, said supporting rods arranged to be loosened slightly to separate any pair of plates and disengage the projecting lugs from a tube to permit it to be removed togethed with its asso-- ciated coil without disturbing the remaining tubes and loading coils in the column.

'10. In amounting arrangement for loading coils, a plurality of tubes arranged in column formation, a loading coil in each of said tubes, flat plates between each tube and closing the ends thereof, said plates and said tubes forming the sole'suppor t for the loading coils, and means for clamping said plates and tubes together so as to permit the removal of any loading coil without disturbing the remaining ones in the column.

11. A mounting arrangement for loading coils comprising separate tubes mounted in a column and each containing a loading coil, fiat plates separating and closing the ends of each tube, said tubes and'said flat plates forming the sole support for said loading coils, means for clamping said plates and tubes together, said clamping "means arranged to permit the removal of a single tube and its. associated loading coil from the column while maintaining the remaining ones intact.

'CECIL RHODES.

JOHN HAY PHILLIPS. 

